Chuck.



PATENTED MAR. 19, 1907.

C. G. HOLMBBRG.

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CHARLES e. HOLMBERG, or NEW YORK, N. Y.

CHUCK.

menses.

Specification of Letters Patent.

Patented March 19, 1907.

Application filed Gctcber 12, 1905. Serial-1N0. 282,472.

To all whom it may concern:

Be it known that I, CHARLES G. HOLM- BERG, a subject of the King of Sweden, resid ing at N ew York, in the county of New York and State of New York, have invented certain new and useful Improvements in Chucks,

of which the following is a specification.

designates in the direction indicated by the My invention relates to chucks for drillpresses, and has for. its object the provision of a device of this character so constructed serted therein without stopping the drillpress to which the chuck is attached.

Further objects and advantages of the invention will be set forth in the detailed description which now follows.

In the accompanyin drawings, Figure -1 is a view, partly in side elevation and partly in that a drill may be removed therefrom or 'insection, of a chuck constructed in accordance with the invention; and Fig. 2' is a trans-- verse section upon line 2 2 of Fig. 1 looking arrows. Like numerals designate similar parts in. both of the figures of the drawing.

Referring to the drawing, the numeralfi the body of the chuck, having a tapered opening 6 formed therein for the reception of the usual drill-press spindle.

'Mounted for limited rotative movement of chuck-jaws 10 to thereby actuate said.

well known in the art to which thislnvention carried by sleeve 14 and is upon body 5 of the chuck is a j aw-actuating sleeve 7, carrying threaded members 8, adapted to engage with threaded portions 9 jaws when it is desired to open or close them. The'fabove-described arrangement of par-ts 1s relates, and further description thereof is thought to be unnecessary. j j I Referring now more particularlyto the improvements constituting the present in-. vention, the numeral 14 designates a sleeve which. is mounted for a limited rotative movementupon the peri hery of'body 5 and is retained in positiontl iereon bya nut 15,- threaded at 16 upon a reduced portion 17 of said.body. The outer faces of sleeves 7. and 14 are knurled, as is clearly illustrated in.

lhe numeral 19 designates a ring, which is provided with teeth 19. If desired, these teeth' may be formed directly upon an integral part of sleeve 14; but it is more convenient and economical to form said teeth upon a ring such said tool is "being used to impart movement to sleeve 7. This construction is old in the art to which this device relates and 1s Illustrated'merely to. show means for manually sleeve 7 -when 7 5 actuating the jaw-controlling the drill-press is stationary. r

The operation of the device as follows: When it is desired to insert'a drill in the jaws of the chuck without stopping the movement of the drill-press to which such chuck is ap-.8o

plied, the operator holds the drill imposition to be grasped by the jaws of the chuck with. one hand, while withthe other hand he grasps sleeve 7 and holds it against movement. The

body 5 of the chuck will of course continue to move under the impulse of-the; drill-press spindle, and a movement of sleeve 7 'with'r'elation to body 5 will result, said movement being in a direction opposite to the rotation.

tuates ja\ 2vs 10 in. the usual .mahnor and causes them togrip thedrill, as will be readily understood. .When it is desired toresleeve Hand holds it against rotation. Since body 5 continues to move. and since the earwheels 21 are carried by said body, it follows thatthe stoppage of the sleeve14, and conse- 'engagement of said gear-wheels with said ring, cause said gear-wheels to rotateupon studs 20. This rotation .of wheels 21 will, through their body 5. This movement will be in the direction of rotation of body 5 and will conseurlently'retractjayvs 10 to thereby release the ri l.' I

as is shown and to then drive said ring into position in the sleeve.

seen that simple and eflicient'measfor re 1 moving a drill from the chuck or for inserting 22, formed upon the upper face of 69' of sleeve 7, while that portion of 6 5 same 111 engagement with the teeth 11 while '70 of sand body. Thismov'ement of sleeve 7 ad on move a drill from x the'chuck without stbp- -pih g the drill -press, the operator grasps 5' engagement with teeth 22 'of sleeve 7, impart a movement to said sleeve ,ivith relation to :05

From the foregoing description-itwill be 1 1o quently of toothed ring 19min, through the loo with extensions having threaded surfaces tended it is to be understood that my invenure from said invention a 'drill therein Without stopping the drillpress areherein provided; but-While the elements shewn and described are well adapted to serve the purposes for which they are intion is not limited to the exact construction shown,for changes within the scope of the appended claim may be madewithout depart- Having described my invention, what-l claimisv A drill-chuckcomprising abody, portion, gripping-jaws formed with threaded faces I an movable in said body. portion, a sleeve carried upon said body portion; and formed and projecting throngh said body portion in presence oftwo witnesses into engagement \Vltll said threaded facesuponsaid jaws, said sleeve being adapted for limited movement upon said body portion, a second sleeve loosely mounted upon seidbody portion, the adjacent edges. of said sleeves 

